421305481 has 2 divisors, whose sum is σ = 421305482. Its totient is φ = 421305480.

The previous prime is 421305473. The next prime is 421305503. The reversal of 421305481 is 184503124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 380601081 + 40704400 = 19509^2 + 6380^2 .

It is a cyclic number.

It is not a de Polignac number, because 421305481 - 2³ = 421305473 is a prime.

It is a super-2 number, since 2×421305481² = 354996616641282722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (421305431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210652740 + 210652741.

It is an arithmetic number, because the mean of its divisors is an integer number (210652741).

Almost surely, 2^421305481 is an apocalyptic number.

It is an amenable number.

421305481 is a deficient number, since it is larger than the sum of its proper divisors (1).

421305481 is an equidigital number, since it uses as much as digits as its factorization.

421305481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 421305481 is about 20525.7272952751. The cubic root of 421305481 is about 749.6623552768.

The spelling of 421305481 in words is "four hundred twenty-one million, three hundred five thousand, four hundred eighty-one".